Invest in Litecoin, not in these scam coins
Why LTC?
yeah, why buying some simple clone of bitcoin ? :/
The comparison is simple, the only two in that list that have real anonymous features are Monero and ShadowCash. (aka ring signatures)
If you need volume, I would say that at the moment, buy Monero. Also, it's a POW coin (constant volume because of miners dumping), and CryptoNote (so don't expect something like Bitcoin).
You can also choose ShadowCash. You can use it as a classic coin or an anon token.
The best part of it atm is the wallet, which has one of the best UI in crypto-world, and I think the UI v2 which will be released soon will make it the best without doubt.
On the development side, Monero is maybe more active than Shadow Project, but most of the development is just to fill the gap of functionalities compared to Bitcoin. (when Shadow has already those functionalities, as it's a fork of Bitcoin.)
Shadow development is atm on a decentralized market. (Alpha is coming but it takes more time, as their is less development ressources)
For Shadow, at the moment it's more about investing, the volume is too low for doing mixing or other things.